NEED HELP! How to check Impedance Rise on Subwoofers with a meter!

[swollen_cu 10+ year member]

Hi, I was just wondering how to check the impedance rise with a meter.

I know I can check it by positive and negative on each voice coil.

But can I wire it in series or parallel and check it from there?

Let's just say I have a D4 Sub and wire it down to 2 ohm.

And I just tap on to the positive and negative.

Will it be accurate or I have to test each voice coil individually?

The reason being is that the subs are already in the box and

I dont feel like taking it out the box because the subs are pretty heavy.

I was just going to test it on the terminals, but the voice coils are already wired.

And what setting on the meter is the correct way to read it.

Thanks in advance....

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[outsideshot23 10+ year member]

need clamp meter.. cant check it with DMM

 

[loud-n-low 10+ year member]

test it at the terminal on the box, see if it reads out around 2 ohms...if thats what your askin help with

 

[outsideshot23 10+ year member]

you can check impedence just by touching pos and neg speaker wires.. you cannot check imp rise with a dmm.. you need a clamp meter.. your imp will show what they are wired to reguardless of box or wattage... to check RISE you need a clamp meter.. hope i made sense

 

[swollen_cu 10+ year member]

you can check impedence just by touching pos and neg speaker wires.. you cannot check imp rise with a dmm.. you need a clamp meter.. your imp will show what they are wired to reguardless of box or wattage... to check RISE you need a clamp meter.. hope i made sense

Yeah, I kind of understand. I can use a clamp meter from a friend. So the subs doesnt need to be on to check it right?

What setting on the meter is the correct way to set it? Thanks

 

[swollen_cu 10+ year member]

test it at the terminal on the box, see if it reads out around 2 ohms...if thats what your askin help with

Yeah, that's what I wanted to know. I just thought that you have to check each

voice coil individually. But the subs does not need to be on right? Thanks

 

[y2kbugger 10+ year member]

well since your measuring the current going through the wire, by the field around the wire, the electrons need to be flowin.

 

[ahole-ic]

LOL this thread is FULL of misinformation.

You need BOTH a DMM and Clamp Meter. Put the clamp on all positive wires. Set the clamp to measure AC current. Put the DMM on a positive and negative terminals and set to AC voltage. Play a tone. Write down the current and voltage. Multiply those together and you get the actual wattage. Divide the voltage by the current and you get the impedence after rise.

 

[swollen_cu 10+ year member]

LOL this thread is FULL of misinformation. You need BOTH a DMM and Clamp Meter. Put the clamp on all positive wires. Set the clamp to measure AC current. Put the DMM on a positive and negative terminals and set to AC voltage. Play a tone. Write down the current and voltage. Multiply those together and you get the actual wattage. Divide the voltage by the current and you get the impedence after rise.

Wow! That's a lot of work just to check the imp rise. Plus you have to do math too. haha.

It's cool. Thanks for the info. It was straightforward. I just wanted to check the ohm of

the sub itself while it's not playing. Just wanted to see if its higher than 2 ohms or lower than 2 ohms.

Because I have 2 subs and it'll make a big difference when they're together. thanks

 

[outsideshot23 10+ year member]

well since your measuring the current going through the wire, by the field around the wire, the electrons need to be flowin.

dont have to have it playing.. you can check a sub sitting on the floor by touching pos and heg on same coil.. same with speaker wire.. if you already got it wired up just check by touching to pos and neg.. this will not show what your coils are this will show what you are wired to... nothing has to be running

 

[outsideshot23 10+ year member]

LOL this thread is FULL of misinformation. You need BOTH a DMM and Clamp Meter. Put the clamp on all positive wires. Set the clamp to measure AC current. Put the DMM on a positive and negative terminals and set to AC voltage. Play a tone. Write down the current and voltage. Multiply those together and you get the actual wattage. Divide the voltage by the current and you get the impedence after rise.

or not... he was looking for the imp of his sub.. he just wrote it wrong in the thread.. read everything and you would know whatr he was looking for

 

[outsideshot23 10+ year member]

and i believe the setting is 2k.. i cant be sure without looking at it in front of me but if it says 200 or something obviously its not 200 ohms.. lol.. should be an ohm sybol..

 

[rumple4skin 10+ year member]

LOL this thread is FULL of misinformation. You need BOTH a DMM and Clamp Meter. Put the clamp on all positive wires. Set the clamp to measure AC current. Put the DMM on a positive and negative terminals and set to AC voltage. Play a tone. Write down the current and voltage. Multiply those together and you get the actual wattage. Divide the voltage by the current and you get the impedence after rise.

vary well put, there are a few guys on here with good info but beware of some peoples advice that you get at 12 pm from kids that have to be at school in the morning

 

[swollen_cu 10+ year member]

or not... he was looking for the imp of his sub.. he just wrote it wrong in the thread.. read everything and you would know whatr he was looking for

My bad about it. I didnt know how to say it. But you know what I mean. Thanks for the info.

 

[rumple4skin 10+ year member]

its ok for you to not know what your talking about but for someone to try and tell you how to half way do something is bs